SPEED, TIME AND DISTANCE (CDS)

Total Questions: 54

51. The distance between two points ( A and B) is 110 km. X starts running from point A at a speed of 60 km/h and Y starts running from point B at a speed of 40 km/h at the same time. They meet at a point C, somewhere on the line AB. What is the ratio of AC to BC? [2014 (II) Evening Shift ]

Correct Answer: (a) 3 : 2
Solution:Distance between two points = 110km

52. A man rides one-third of the distance from A to B at the rate of x km/h and the remainder at the rate of 2 y km/h. If he had travelled at a uniform rate of 6z km/h, then he could have ridden from A to B and back again in the same time. Which one of the following is correct? [2014 (II) Evening Shift ]

Correct Answer: (c)
Solution:Let the total distance be d.


53. A train travels at a speed of 40 km/h and another train at a speed of 20 m/s. What is the ratio of speed of the first train to that of the second train? [2014 (II) Evening Shift ]

Correct Answer: (b) 5 : 9
Solution:Given, speed of a train = 40 km/h

54. A train takes 9 s to cross a pole. If the speed of the train is 48 km/h, then the length of the train is [2014 (I) Morning Shift]

Correct Answer: (b) 120 m
Solution:Let the length of the train be x m.